Welcome, jdcyclone
While it has support for 35 languages and Unicode, RH 7 does
not support right-to-left languages at this time.
For the list you can download this Reviewer's Guide.
Adobe
RoboHelp 7 Reviewer's Guide

I found this quote on Peter's Web site:
"the reference to 35 languages just refers to the languages
we included out-of-the-box, with full support for spell-checking,
thesaurus and hyphenation, but beyond that, you can insert any
character supported by the Unicode standard and publish it
successfully to any format that RoboHelp supports."

So am I correct in saying that Arabic and Hebrew ARE
supported because they are supported by the Unicode standard, they
just aren't fully supported by RoboHelp (thesaurus, spelling,
etc.)?

Last post was from November 2007, now we´re in August 2009. Has anything happened re. RH support of Arabic and right-to-left languages in the meantime? We use RH7, has anybody discovered any RH7 workarounds for handling Arabic? Is RH8 any better at handling Arabic? Any news re. RH handling of Arabic at all?

Lack of RH support for Arabic is a massive problem for us: our Arabic translators want to use RHX3 (apparently the last RH version with Arabic support) when localizaing our RH projects, but many of the features we use RH7 (such as variables, snippets, etc.) aren't supported by RH X3.

Millions and millions of people use Arabic, and they require documentation too. How come such an important language apparently keeps being neglected in RH?

The long and the short of it is that you may be able to generate Arabic ouptut so long as you do not use the RH editor to edit the content. RH8 is the same as RH7 in this respect. You can check out the following links which will help.